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NASA Night-light Imagery Tracks US Energy Transition, Global Volatility
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Kel Elkins/NASA’s Scientific Visualization Studio
New nighttime maps based on NASA satellite imagery are upending assumptions, revealing a world where artificial brightening and dimming have intensified over the past decade. The findings show intense flaring over major oil and gas fields in the United States, while factors such as rural electrification and energy conservation are changing how billions around the world experience the night.
Scientists analyzed 1.6 million satellite images collected every night for nine years to picture Earth in a new light. Their findings reveal a world flickering with change. Data image by Michala Garrison/ NASA Earth Observatory“Unlocking energy sector insights is just one way NASA data is advancing national security interests at a critical time,” said Miguel Román, deputy director for atmospheres and data systems at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Earth at night has so much to teach us.”
The study team, led by Tian Li and Zhe Zhu at the University of Connecticut, used a new algorithm to analyze 1.16 million satellite images collected at approximately 1:30 a.m. local time every day for nine years by the Visible Infrared Imaging Radiometer Suite (VIIRS). The refrigerator-size sensors, orbiting Earth at over 16,000 mph, can resolve light sources down to the scale of a toll booth on a dark highway. They fly aboard Earth science satellites that were launched and operated by NASA and the National Oceanic and Atmospheric Administration (NOAA).
The analysis, reported April 8 in Nature, covered most of the inhabited world, from latitudes between 60 degrees south and 70 degrees north. During the time frame analyzed—2014 to 2022—domestic production of oil and natural gas reached record levels, driven by technological developments and horizontal drilling. Satellite imagery revealed cycles of intense gas flaring over central U.S. regions, particularly the Permian Basin in Texas and North Dakota’s Bakken Formation. Flaring occurs at oil wellheads when excess gas—mostly methane—is burned off. The process releases carbon dioxide and soot, among other byproducts.
Flared gas is money burned, said Deborah Gordon, a methane expert at the non-profit Rocky Mountain Institute (RMI) who was not involved in the study. “Letting operators, investors, and insurers know that this is happening is a huge value proposition, both privately and publicly to the world. And it all starts with taxpayer dollars and NASA.”
Scientists, such as Gordon, and analysts across industries, use NASA night-light data to understand how energy moves through grids, pipelines, and supply chains in near real time. The data is free to access via the agency’s Black Marble product suite.
“Understanding where gas is being wasted around the globe and to have this data be public is huge for energy, and economic and environmental security,” Gordon said. “The Black Marble product provides free, openly validated flaring data that are critical inputs into RMI’s suite of public tools.”
City of Light saves energy, global shocks revealedThe latest nighttime maps also challenge some long-held assumptions.
Instead of a planet that simply glows brighter over time due to development—the prevailing view among researchers for decades—the new analysis portrays a world flickering with industrial booms and busts, construction, and blackouts, as well as more gradual shifts, such as policy-driven retrofits.
The study team was able to detect changes in night lights continuously, pixel by pixel, using methods that filter out interference from moonlight, clouds, and atmospheric effects. Their approach acts like giving satellites “smart glasses,” allowing them to focus on real changes.
Overall, the researchers found that global radiance increased by 34% during the study period, but that surge masks large areas of dimming. Such “bidirectional changes” often happen side by side. In the U.S., for example, West Coast cities grew brighter as their populations increased, while much of the East Coast showed dimming, which the team attributed to the use of energy-efficient LEDs and broader economic restructuring.
The authors concluded that internationally, nighttime light surged in China and northern India along with urban development, while LEDs and energy conservation measures coincided with reduced light pollution in Paris and throughout France (a 33% dimming), the UK (22% dimming), and the Netherlands (21% dimming). European nights dimmed sharply in 2022 during a regional energy crisis that followed the outbreak of the Russia-Ukraine conflict.
Tracking such dips and flares night after night “is like watching the heartbeat of the planet,” said coauthor Zhe Zhu, director of the Global Environmental Remote Sensing Laboratory at the University of Connecticut.
Flying since 2011, VIIRS sensors now are carried aboard three satellite platforms: Suomi NPP, NOAA-20, and NOAA-21. The instruments can sense light spanning visible to thermal infrared wavelengths. Their unique day-night band is ultrasensitive in low-light conditions, achieving finer resolution compared to previous night-light imagery provided by the Defense Meteorological Satellite Program.
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By Sally Younger
NASA’s Earth Science News Team
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Hubble Spies an Active Spiral
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ESA/Hubble & NASA, M. J. Koss, A. J. Barth
A luminous swirl set against the deep black of space, the barred spiral galaxy IC 486 glows with a soft, ethereal light in this new NASA Hubble Space Telescope image.
IC 486 lies right on the edge of the constellation Gemini (the Twins), around 380 million light-years from Earth. Classified as a barred spiral galaxy, it features a bright central bar-shaped structure from which its spiral arms unfurl, wrapping around the core in a smooth, almost ring-like pattern.
Hubble’s keen eye reveals subtle variations in color across the galaxy. The pale, luminous center is dominated by older stars, while faint bluish regions in the surrounding disk trace pockets of more recent star formation. Wisps of dust thread through the galaxy’s structure, gently obscuring light and tracing regions of increased molecular gas where new stars are likely to form.
The barred spiral galaxy IC 486 glows with a soft, ethereal light in this new NASA Hubble Space Telescope image. ESA/Hubble & NASA, M. J. Koss, A. J. Barth
At the galaxy’s center a noticeable white glow outshines the starlight around it. This is light from IC 486’s active galactic nucleus (AGN), which is powered by a supermassive black hole more than 100 million times the mass of the Sun. Every sufficiently large galaxy hosts a supermassive black hole at its center, but some of these black holes are particularly ravenous, assembling vast amounts of gas and dust into swirling accretion disks from which they feed. The intense heat generated by the orbiting disk of material generates intense radiation, including X-rays, which can outshine the entire rest of the galaxy. In these cases, the galaxy is known as an active galaxy, with an AGN at its center.
The data used to make this image comes from two separate observing programs — #17310 (PI: M. J. Koss) and #15444 (PI: A. J. Barth) — with similar aims: to survey nearby active galaxies like IC 486 and record detailed, high-quality images of their central black holes and the stars near the core of the galaxy. By combining Hubble’s sharp imaging capabilities with large comprehensive samples, these programs enable detailed comparisons of how stars, gas, dust, and black holes interact in galaxy centers.
This wide-field view of the spiral galaxy IC 486 from NASA’s Hubble Space Telescope features a vibrant scene of distant background galaxies and foreground stars. Some stars appear with characteristic diffraction spikes. However, much of the field is dominated by the more diffuse, orange-red smudges of far more distant galaxies. ESA/Hubble & NASA, M. J. Koss, A. J. Barth
A key goal of this work is to understand how galaxies grow by linking their large-scale structures, such as bars and spiral arms, to activity in their nuclei. To achieve this, the research teams leverage both expert classifications and citizen science through Galaxy Zoo, with datasets they will ultimately release to the public. In parallel, researchers are using the same images to test how well large language models and other machine learning techniques can reproduce or extend human classifications, offering a new way to scale galaxy morphology studies to the largest surveys that telescopes like Euclid and the Vera Rubin Observatory are preforming, and NASA’s Roman Space Telescope will perform.
Beyond IC 486, distant background galaxies and foreground stars pepper the image. Some stars appear with characteristic diffraction spikes, while the more diffuse, reddish smudges are far more distant galaxies scattered across the cosmos.
Though it may appear calm and orderly, IC 486 is a dynamic system shaped by gravity and stellar evolution. Over millions of years, its structure will continue to evolve as stars are born, age, and fade, contributing to the ongoing story of galactic life in the universe.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubbleMedia Contact:
Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble Images
Hubble’s Galaxies
Hubble News
Hubble Spies an Active Spiral
- Hubble Home
- Overview
- Impact & Benefits
- Science
- Observatory
- Team
- Multimedia
- News
- More
ESA/Hubble & NASA, M. J. Koss, A. J. Barth
A luminous swirl set against the deep black of space, the barred spiral galaxy IC 486 glows with a soft, ethereal light in this new NASA Hubble Space Telescope image.
IC 486 lies right on the edge of the constellation Gemini (the Twins), around 380 million light-years from Earth. Classified as a barred spiral galaxy, it features a bright central bar-shaped structure from which its spiral arms unfurl, wrapping around the core in a smooth, almost ring-like pattern.
Hubble’s keen eye reveals subtle variations in color across the galaxy. The pale, luminous center is dominated by older stars, while faint bluish regions in the surrounding disk trace pockets of more recent star formation. Wisps of dust thread through the galaxy’s structure, gently obscuring light and tracing regions of increased molecular gas where new stars are likely to form.
The barred spiral galaxy IC 486 glows with a soft, ethereal light in this new NASA Hubble Space Telescope image. ESA/Hubble & NASA, M. J. Koss, A. J. BarthAt the galaxy’s center a noticeable white glow outshines the starlight around it. This is light from IC 486’s active galactic nucleus (AGN), which is powered by a supermassive black hole more than 100 million times the mass of the Sun. Every sufficiently large galaxy hosts a supermassive black hole at its center, but some of these black holes are particularly ravenous, assembling vast amounts of gas and dust into swirling accretion disks from which they feed. The intense heat generated by the orbiting disk of material generates intense radiation, including X-rays, which can outshine the entire rest of the galaxy. In these cases, the galaxy is known as an active galaxy, with an AGN at its center.
The data used to make this image comes from two separate observing programs — #17310 (PI: M. J. Koss) and #15444 (PI: A. J. Barth) — with similar aims: to survey nearby active galaxies like IC 486 and record detailed, high-quality images of their central black holes and the stars near the core of the galaxy. By combining Hubble’s sharp imaging capabilities with large comprehensive samples, these programs enable detailed comparisons of how stars, gas, dust, and black holes interact in galaxy centers.
This wide-field view of the spiral galaxy IC 486 from NASA’s Hubble Space Telescope features a vibrant scene of distant background galaxies and foreground stars. Some stars appear with characteristic diffraction spikes. However, much of the field is dominated by the more diffuse, orange-red smudges of far more distant galaxies. ESA/Hubble & NASA, M. J. Koss, A. J. BarthA key goal of this work is to understand how galaxies grow by linking their large-scale structures, such as bars and spiral arms, to activity in their nuclei. To achieve this, the research teams leverage both expert classifications and citizen science through Galaxy Zoo, with datasets they will ultimately release to the public. In parallel, researchers are using the same images to test how well large language models and other machine learning techniques can reproduce or extend human classifications, offering a new way to scale galaxy morphology studies to the largest surveys that telescopes like Euclid and the Vera Rubin Observatory are preforming, and NASA’s Roman Space Telescope will perform.
Beyond IC 486, distant background galaxies and foreground stars pepper the image. Some stars appear with characteristic diffraction spikes, while the more diffuse, reddish smudges are far more distant galaxies scattered across the cosmos.
Though it may appear calm and orderly, IC 486 is a dynamic system shaped by gravity and stellar evolution. Over millions of years, its structure will continue to evolve as stars are born, age, and fade, contributing to the ongoing story of galactic life in the universe.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubbleMedia Contact:
Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble Images
Hubble’s Galaxies
Hubble News
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